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Help oem rs4 b5 RPM/tachometer dont work with SM4!?

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  • Help oem rs4 b5 RPM/tachometer dont work with SM4!?


    Hi!
    I have built one 2001mod Audi RS4 B5 with 5cyl 2.5 20v Turbo 751whp / 782wnm 2.3bar.
    User Autronic SM4, but I struggle with and get org tachometer (RPM) dont will work.
    I use pin 11 from the blue connector on the speedometer and connect it into the pin 12 that is set up for Tacho output at ECU.
    On pin 11 from instument so I measure 7-7.5v but on an stock RS4 so I measure 5-6v .. With a AutoMeter tachometer does work everything properly.

    Can anyone help with that, what should I do?
    Thanks in advance!






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